Miasma theory ruled from 4 BC until 1800s. Miasmata (airborne vapors, noxious, polluted air) caused most diseases. This encouraged cleanliness. Germ theory of d

Miasma theory ruled from 4 BC until 1800s. Miasmata (airborne vapors, noxious, polluted air) caused most diseases. This encouraged cleanliness. Germ theory of disease replaced it. "Malaria was prevalent in the Roman Empire, and the Roman scholars associated the disease with the marshy or swampy lands where the disease was particularly rampant.[13][14] It was from those Romans the name "malaria" originated. They called it malaria (literally meaning "bad air") as they believed that the disease was a kind of miasma that was spread in the air, as originally conceived by Ancient Greeks. Since then, it was a medical consensus for centuries that malaria was spread due to miasma, the bad air." [1] [1] https://en.wikipedia.org/wiki/Mosquito-malaria_theory https://en.wikipedia.org/wiki/Mosquito-malaria_theory